General Review (cell types, etc.)

Question 1

How many tissue types do we deal with in this class?

Answer 1

5

Question 2

What are the tissue types in the stomach?

Answer 2

Columnar Epithelium
Blood
Nervous Tissue
Loose connective tissue
Smooth Muscle Tissue

Question 3

What is Gametogenesis?

Answer 3

The process of formation and development of specialized generative cells, gametes (oocytes or sperms). This process, involving the chromosomes and cytoplasm of the gametes, prepares these sex cells for fertilization. During gametogenesis, the chromosome number is reduced by half and the shape of the cells is altered. A chromosome is defined by the presence of a centromere, the constricted part of a chromosome. Before DNA replication in the S phase of the cell cycle, chromosomes exist as single-chromatid chromosomes. A chromatid consists of parallel DNA strands. After DNA replication, chromosomes are double-chromatid chromosomes.

Question 4

Some benefits to Meiosis:

Answer 4

1. Provides constancy of the chromosome number from generation to generation by reducing the chromosome number from diploid to haploid, thereby producing haploid gametes.
2. Allows random assortment of maternal and paternal chromosomes between the gametes.
3. Relocates segments of maternal and paternal chromosomes by crossing over of chromosome segments, which “shuffles” the genes and produces and recombination of genetic material.